Analysis
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max time kernel
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max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
13/03/2024, 23:03
Static task
static1
Behavioral task
behavioral1
Sample
c711a7b74c62cbdcd059ec9421ecdc3e.dll
Resource
win7-20240221-en
General
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Target
c711a7b74c62cbdcd059ec9421ecdc3e.dll
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Size
80KB
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MD5
c711a7b74c62cbdcd059ec9421ecdc3e
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SHA1
2c5d751748523f47897c4490f014e5e01b37d1bf
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SHA256
27ea524cc2f12cc4b9e70878667bcb8901e7d1548d0b1341b36b7722c056213b
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SHA512
8daaaf0b8496ce05fd66dfd1812b1b7fb63fc4c25d7954760bc708f018becad765b274dbfd52557d2ddbdb627199fc8844ed6a2b2496c80cd59dae059406c730
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SSDEEP
1536:T2lFYHQuwVlTS8uT4Dpd7kJNNV+ZA0J7Pt0s+96Ve5Uhm:TUA2lTS8ukDzAJNL+22F0s+9Ye50
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 4692 rundll32Srv.exe 1764 DesktopLayer.exe -
resource yara_rule behavioral2/memory/4692-6-0x0000000000400000-0x0000000000413000-memory.dmp upx behavioral2/memory/4692-10-0x0000000000400000-0x0000000000413000-memory.dmp upx behavioral2/memory/1764-17-0x0000000000400000-0x0000000000413000-memory.dmp upx -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\px34FA.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31094170" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "417136010" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3427283627" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3423534160" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\"" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31094170" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3423534160" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31094170" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{F7AA33E5-E18D-11EE-9216-E63A1A6527EC} = "0" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe 1764 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4568 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 4568 iexplore.exe 4568 iexplore.exe 3196 IEXPLORE.EXE 3196 IEXPLORE.EXE 3196 IEXPLORE.EXE 3196 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 4020 wrote to memory of 3244 4020 rundll32.exe 91 PID 4020 wrote to memory of 3244 4020 rundll32.exe 91 PID 4020 wrote to memory of 3244 4020 rundll32.exe 91 PID 3244 wrote to memory of 4692 3244 rundll32.exe 92 PID 3244 wrote to memory of 4692 3244 rundll32.exe 92 PID 3244 wrote to memory of 4692 3244 rundll32.exe 92 PID 4692 wrote to memory of 1764 4692 rundll32Srv.exe 93 PID 4692 wrote to memory of 1764 4692 rundll32Srv.exe 93 PID 4692 wrote to memory of 1764 4692 rundll32Srv.exe 93 PID 1764 wrote to memory of 4568 1764 DesktopLayer.exe 94 PID 1764 wrote to memory of 4568 1764 DesktopLayer.exe 94 PID 4568 wrote to memory of 3196 4568 iexplore.exe 95 PID 4568 wrote to memory of 3196 4568 iexplore.exe 95 PID 4568 wrote to memory of 3196 4568 iexplore.exe 95
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\c711a7b74c62cbdcd059ec9421ecdc3e.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4020 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\c711a7b74c62cbdcd059ec9421ecdc3e.dll,#12⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3244 -
C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4692 -
C:\Program Files (x86)\Microsoft\DesktopLayer.exe"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1764 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4568 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4568 CREDAT:17410 /prefetch:26⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:3196
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
52KB
MD517efb7e40d4cadaf3a4369435a8772ec
SHA1eb9302063ac2ab599ae93aaa1e45b88bbeacbca2
SHA256f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386
SHA512522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450